Question 1: √230 ≈ 15.2

1. One pair of digits, so multiply by 10.
2. Find the square root of 2.3 using the first half of the A scale.

1.52 x 10 = 15.2

Question 2: √455 ≈ 21.3

1. One pair of digits, so multiply by 10.
2. Find the square root of 4.55 using the first half of the A scale.

2.13 x 10 = 21.3

Question 3: √9600 ≈ 98

1. One pair of digits, so multiply by 10.
2. Find the square root of 96 using the second half of the A scale.

9.8 x 10 = 98

Question 4: √34500 ≈ 186

1. Two pairs of digits, so multiply by 10 x 10 = 100.
2. Find the square root of 3.45 using the first half of the A scale.

1.86 x 100 = 186

Question 5: √840000 ≈ 916

1. Two pairs of digits, so multiply by 10 x 10 = 100.
2. Find the square root of 84 using the second half of the A scale.

9.16 x 100 = 916